Plumb or level device



J. C. KNA PP. PLUMB 0R LEVEL DEVICE.

APPLICATION FILED AUG.I3. 1920.

Patented Mar. 29, 1921.

E. Ma a a INVGNYOR ATTORNEY.

352E331? C. ENAPP, 0F PHILADELPHIA, PEN NSYLVANIA.

ELUMB OR, LEVEL DEVIGE.

eas es;

Specification of Letters Patent. Patgmtgcad Miar 239, $53, 21,

Application tiled August 18, 1920. serial No. $03,344.

To all whom it may concern:

Be it known that 1, JOHN (3. Karen, a citizen of the United States, residing at Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented new and useful Improvements in Plumb or Level Devices, of which the following is a.

specification.

An object of the invention is to provide a device for readily ascertaining the plumb or level of a surface or the like or any degree of angularity thereof.

Among other features the invention com.- prehends an instrument of a simple construction, consisting of few and simple parts that cannot readily get out of order and in which the indicator, indicating the degree of angularity of a surface, is of a visible nature and so mounted and arranged that it will accurately indicate the particular angle or degree of angularity of the surface, or whether the surface 'is in a horizontal or vertical plane...

in the further disclosure of the invention,

reference is to be had to the accompanying drawings, constituting a part of this specification, in which similar characters of ref erence denote'corresponding parts in all the views, and in which,-

Figure 1-is an elevation of the device showing the same applied to an angular surface, and I Fig. 2-is a vertical cross sectional view taken throughthe device.

Referring more part1 the numeral 10 indicates a body or frame which may consist of a rectangular piece of wood provided at itscentralportion with an opening 11 and opposed sets of cut out portions 12, 13, of a clrcular nature. Disposed in the cut out portions 12 are transparent circular disks 14: preferably; made of glass and which are inthe nature of faces, eachdisk having its central portion ground out to form. a ground bearing 15' for receiving the ends of a central pivot or pinlti extend ing through and constituting a part ofari indicator 17 in the nature of an arrow, the

.tail end of the indicator carrying a suitable weight 18. The ends of the pivot or pins '16 are of course tapered and preferably'made "of a very hard material such as a fine grade cularly to the views,"

dark places and so also the indicator may be coated witha luminous paint if desired. in

order to secure the disks inplace and pro;

vide a rigid structure, there are provided a pluralityof opposed securing rings ormemers 22 disposed in the sets of cut out pore tions 13 and over-lapping the disks to hold the disks in position and also serve tofsecure the dial, suitable screws 23 or other fastening devices being provided to pass through the rings into'the wood or material of t e frame or -body 10.

: With'this construction it will be seen that there is provided an instrument in which the delicately mounted indicator will be protected by the transparent disks which su p' port it for its pivotal movement. and that the indicator can be readily seen from either side of the-body, furthermore enabling the user to readily determine the de ree of angularity or the limb or level 0 i a surface upon which the instrument is placed so. that the number of degrees or fractional degrees of angularity from the horizontal or vertical, can be readily determined. By hav-..

ing the cut out portions 13, the securing. rings 22will not project beyond the faces of the body and will also serve as a protection-for the glass or transparent disks. It will be ap arent' that a device of the characterdescrlhedembodies various advantages over the-usual spirit levels or plumb-bobs or' levels whic are not only oft-times'inaccu'rate, but also become very readily broken and furthermore because of the manner in which they are usually arranged, in the frames, cannot be readily read and particular. angularityof the surface accurately determined. n Although it will be understood that l have articular form. of my invention shown 'a and descri ed particular features thereof, it

will be apparent that various slight changes may be made without departing from the Weighted indicator mounted to rotate bespirit of the invention, the scope of Which is tween said disks on the bearing surfaces defined in the appended claim. thereof and a plurality of opposed securing Having described my invention, I claimrings set into the said body to bear against 5 A device of the character described comthe disks, securing them rigidly in position 15 prising a body provided with an opening, a and holding the dial in interposed position circular dial set in the said opening, a plubetween the disks.

rality of opposed transparent dlsks ar- In testimony whereofI affix my signature.

ranged on each side of the dial and formed 10 With centrally out out bearing surfaces, at JOHN C. KNAPP. 

